Improvement in turbine water-wheels



UNITED STATES PATENT OFFICE.

GEORGE TALCOT, OF NEV YORK, N. Y.

IMPROVEMENT IN TURBINE WATER-WHEELS.

Specification forming part of Letters Patent No. 5I,760, dated December 26, 1865.

To all lwhom it may concern:

Be it known that I, GEORGE TAL'oor, of the city, county, and State of New York, have invented a new and useful Improvement in Turbine Water-Wheels; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompan yin g drawings, forming part of this specitcation, in which- Figure l is a plan or top view of a turbine water-wheel provided with my invention; Fig. 2, a vertical section ot the same, taken in the line @c a2, Fig. l.

Similar letters of reference indicate like parts.

Water-wheels which are fitted within scrolls, helices, or cylindrical Water guides or boxes all leak in a greater or less degree at the joints orjunction of the wheel with the scroll, helix, or box, in consequence ot' a tightjoint not being formed in order to avoid frlction. This leakage of course serves to diminish the eicient-y ot the wheel; and the object of this invention is to obtain a tight joint without causingfriction, and to this end I attach a flange to the inner edges ot the scroll, helix, or box, either at top or bottom, or both, said Hanges being ofsuch a shape as to form annular boxes,

stance is represented with buckets constructed so as to discharge the water both at the top and bottom or the wheel.

B represents the scroll in which the wheel is placed, the inner edges ot' the former being near the edges ot' the rims a a of the wheel, but not to bear against them so as to cause friction. (See Fig. 2.) These parts do not require a minute description, as they are not new and are well known to all conversant with turbine water-wheels.

To the top and bottom ofthe scroll B, at its inner edges, there are secured flanges C C, which extend over the joints b between the rims a of the wheel and the inner edges of the scroll, said Hanges being of the shape shown in Fig. 2, and forming annular water-boxes D all around and over the joints b. When the wheel A -is at work or in motion the boxes D will be kept filled with water owing to the centrifugal force generated by the rotation of the wheel. The pressure of the water in the annular boxes D, which is due to the centrifugal force above mentioned, effectually prevents the escape of water from the joints even when the latter are suliiciently loose to avoid any friction whatever between the rims a a and the inner edges ofthe scroll, helix, or box B.

Thus by this very simple and efficient device, quite inexpensive to apply, a very important result is obtained-to wit, secure but Aloose joints, which prevent the leakage or escape or' n ater, and at the same time obviate all friction atthe points specified.

l claim as new and desire to secure by Letters Patent- The annular water-box D, placed over the joints formcd by thejunction of the periphery or rims of the wheel and the inner edges of the scio1l,helix,or box in which the wheel is placed or titted, substantially as and for the purpose herein setbforth.

GEO. TALGOT.

Witnesses:

M. M. LIVINGSTON, O. L. TOPLIFE. 

